Article in autocar. Interesting to hear from Riel on this. Sounds like a done deal. Summary
Avant only
Europe only
4.2 FSI high-revving
So, that’s good for North American RS4 owners…as there won’t be any new competition for our car from Audi in the form of an RS sedan.
The article intimates that B8 RS4 buyers will have an option to choose a manual OR DSG . That’s pretty cool…but I find it hard to believe if the RS5 is DSG only, and if Audi has phased out manuals for cars like the S4/S5 next year.
New ‘wave-style’ discs are added to the braking system. Eschewing conventional design, they feature small indents in the outer edges of the discs that together are claimed to reduce the weight at each corner by around 1.5 kg, reducing unsprung mass.
Wonder if they’re swappable with B7 RS4 rotors…i.e. if we can use these as an OEM lightweight rotor. Since we’ll have the B8 RS5 which will surely get the same technology when it launches refreshed in 2013, we’ll be able to access the parts over here. Saving 13 lbs of rotating mass total is awesome.
well found the replacement to my gti in the coming years. i refuse to buy a 3.0t, i dont like them. i love my 4.2 but wouldnt buy one now cuz its 6 speed only. my daily must be dsg, im spoiled, i love this trans. nebver doing a 6 speed again for my daily commute
wheels and such yes but the rotor offset for the rs5 setup is identical to the R8 the rs4 rotor offset is very different. im sending Dan some r8 rotors so he can build me some LW ones for my rs5 brakes
Here’s a pic of an RS5 setup vs. RS4. Are you referring to the extra material it appears the RS5 hats have, thus pushing the wheels out a bit? Or is there a totally different mount setup? I’m not a big brake fitment guy so I have no idea what we’re talking about when you get down to it.
They’re both 365mm I believe and the calipers look identical. The greater material wouldn’t be a big concern for the B7 RS4 owner, would it?
I think the RS5 rotor will sit more inbound, looks like the hub mating surface is raised from the rotor more… the actual thickness of the hat is probably similar so the rs5 rotor sits in more
dunno…I’d bet a Coke that it sits way farther out than the RS4. I mean the top of the hat…looks much 'taller (if the rotor were flat on a table) than the B7 rotor. Looks like abotu 10mm more. Where’s Richi!
Would be great to mount them up to an RS4. Free 10mm spacers, and that’s exactly what spacer size is perfect on an RS4 with stock wheels.
MTM 10mm spacers are like 300 bucks for 4 wheels…so buying RS5 rotors (or B8 RS4) would be a nice combo of shaved weight + added width. You’d just need longer bolts.
Dreaming of course…the mounting of the rotors hasn’t been discussed.
K maybe I’m confused, but if the hat is “taller” the whole rotor is going to sit further inwards towards the engine isnt it? I guess it all depends on the actual thickness of the hat though.
is the hat mating surface the same thickness between the RS4 and RS5?.. so the distance between the face that rests against the hub and the face that rests against the wheel backpad. If that is the same there should be no change in wheel offset, if its thicker the wheel will be offset by that distance. I would be concerned with covering up the hubcentric cylinder bit that comes out through the rotor… if the RS5 has a thicker mating surface it could cover this up and not allow the wheel to make good contact with the hubcentric bit.
^^^good point. Didn’t think of that. However what’s the difference between running 10mm spacers and this (if the difference is indeed only 10mm)?
Karsty here’s what I was trying to show. These are not RS4 or RS5 rotors, but pretend the normal is B7 RS4 and the one with red is the RS5 rotor. There is more material on the hat, thus it sits ‘taller’ when laying flat on the ground like in the pic…and when mounted would mean the wheel is sitting pushed out wider/more flush by the difference.
a well designed spacer will have a tapered bore that snugly fits the hubcentric cylinder on its backside and then extends the hub centric cylinder with a well machined/tight tolerance hubcentric cylinder outwards… so it extends that lip, whereas the rotor will not. So its like running a spacer that doesnt have the lip extension.
The part in red wouldnt be solid metal though. It would be hollowed out on the inside, so the rotor would sit further inwards, but the wheel sitting against the hat would not sit further outwards. It would stay the same.
